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Expand using suitable identity (3a-5b+4c)2?

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Expand using suitable identity (3a-5b+4c)2?

    • Posted by Geetanshu Tanwar 5 years, 2 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Agrima Gupta 5 years, 2 months ago

    Identity- (a+b+c)2=a2+b2+c2+2ab+2bc+2ca

    (3a)2+(-5b)2+(4c)2+2x3a x (-5b)+2x (-5b)x4c+2x3a x 4c

    answer= 9a2+25b2+16c2-30ab-40bc+24ac

     

     

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